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Roomside Low-E Glass: i89
Introducing LoE-i89, our new energy-saving 4th surface coated glass. It offers more light transmittance and less reflectance than LoE-i81. And it’s now available in annealed making it less expensive. Yet it still delivers a center of glass U-factor of just 0.20 when coupled with our LoE or LoE glass and argon fill in a double-pane unit.

Low Solar Gain Low-E Glass: 366
Cardinal LoE-366 glass is the ultimate performance glass. LoE-366 delivers the ideal balance of solar control and high visibility. It’s also the one glass you can use to be compliant in every ENERGY STAR zone – in a double-pane window. Couple it with LoE-i89, and you’re compliant in the North. Its low SHGC makes it compliant throughout the rest of the country as well.

Medium Solar Gain Low-E Glass: 270
Cardinal LoE-270 glass delivers year-round comfort in all types of weather. In summer, it rejects the sun’s heat and damaging UV rays. In winter, it reflects heat back into the room. Cardinal LoE-270 is very similar to LoE-272 glass, only with slightly more solar control, while LoE-272 offers a little more light transmittance.

High Solar Gain Low-E Glass: 180
When the weather turns frigid, Cardinal LoE-180 glass is the perfect cold remedy. It keeps homes warmer and more comfortable by blocking heat loss to the outside and letting the sun’s heat stream in. With a glass U-Factor of just 0.26 and an SHGC of 0.69, LoE – 180 is the ideal product for passive solar applications. It extends a warm welcome home while achieving the highest ER values.